Collapsible container sleeve



FIG. 1 is an exploded left front perspective view of a collapsible container sleeve showing my new design, the top and bottom covers are identical with one another and are shown in dashed lines as part of the environment when the sleeve is used to house goods, and forms no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view, the right side elevational view being a mirror image thereof;

FIG. 4 is a front elevational view showing an horizontally centered vertical fold line, the rear elevational view is a mirror image thereof; and,

FIG. 5 is a detail view taken within the encircled corner shown in FIG. 1 and identified by numeral 5, the remaining inside corners are duplicative thereof. 

The ornamental design for a collapsible container sleeve, as shown and described. 